Apparatus for collecting debris

ABSTRACT

Debris, which is collected from a lawn, for example, is compressed prior to being supplied to a bag by rotatably mounted compactor blades rotating between stripper bars, which substantially strip the debris from the blades. The debris may be picked up by rotatably mounted wires, which pass between stripper bars, so that the debris is substantially removed from the wires by the stripper bars prior to the debris being directed to the compactor blades.

United States Patent 11 1 1111 3,888,170 Doering June 10, 1975 [54] APPARATUS FOR COLLECTING DEBRIS 2.630.064 3/1953 Vutz 100/189 X 2.703.957 3/1955 Russell 56/364 1751 lnvemo Charles Clarksvllle, 2,817,945 12/1957 McClellan 56/364 x 2,872,772 2/1959 NOlt 56/364 2,920,752 1/1960 Heinlein et a1. 100/189 X 173 l Asb'gnee' firmly Hardy 3,055162 9/1962 Phillips 1. 56/364 3.747.313 7/1973 Denzin 56/364 [22] Filed: May 6, 1974 Primary Examiner-Edward L. Roberts [2]] App! 467394 Alrorney, Agent. or Firm-Frank C. Leach, Jr.

Related US. Application Data [62] Division Of Scr. N0. 342.166, March 16, 1973. Pat. [57] ABSTRACT No. 3,849,824. Debris, which is collected from a lawn, for example, is

compressed prior to being supplied to a bag by rotat- [52] US. Cl 100/177; 100/189 ably mounted compactor blades rotating between [51 Int. Cl E01h 1/04 stripper bars, which substantially strip the debris from [58] Field of Search .1 15/79, 83-86; the blades. The debris may be picked up by rotatably 56/364; 100/177, 189 mounted wires, which pass between stripper bars, so that the debris is substantially removed from the wires [56] References Cited by the stripper bars prior to the debris being directed to the compactor blades.

13 Claims, 5 Drawing Figures APPARATUS FOR COLLECTING DEBRIS This application is a division of application Ser. No. 342,166, filed Mar. 16, l973, now US. Pat. Ser. No. 3,849,824.

In the copending patent application of Charles W. Doering and Samuel W. Smith for "Rotary Brush Sweeper And Bagger," Ser. No. 331,694, filed Feb. 12, 1973, which is a continuation of application Ser. No. 195,607, filed Nov. 4, 1971, there is shown an apparatus for picking up debris and then compressing the debris through utilization of rollers prior to the debris being supplied to a collecting bag. In my copending application for Debris Collecting Apparatus," Ser. No. 268,064, filed June 30, 1972, there is shown another arrangement for compressing debris prior to it being supplied to a collecting bag. In this arrangement, a rotatably mounted compression roller has fins movable in and out of orifices in the roller by a crankshaft.

The present invention utilizes another arrangement for compressing debris which has been picked up. In the apparatus of the present invention, stripper means, which are preferably a plurality of U-shaped stripper bars, are located between rotatably mounted compactor blades and disposed relative to the path of travel of the compactor blades and a surrounding housing so that the blades rotate in a rotary path about a horizontal axis while having both compression of the debris and stripping of the debris from the compactor blades after the debris has been advanced to a debris confining chamber.

The apparatus of the present invention also contemplates a pivotally mounted cover cooperating with the debris pick-up means to enable the cover to float relative to the pick-up means to accommodate relatively heavy loads of debris. Thus, any tendency for the pickup means to be prevented from rotating by debris lodging within a fixed cover is eliminated.

An object of this invention is to provide an apparatus for compressing collected debris.

Other objects of this invention will be readily perceived from the following description, claims and drawmgs.

This invention relates to an apparatus for collecting debris including a frame having wheels to support the frame. A housing, which is supported by the frame, has means to receive debris. A plurality of blades is disposed within the housing and is mounted for rotation about an axis with the blades being spaced from each other in the axial direction. Means is disposed between each adjacent pair of the blades and cooperate with the housing to form a debris confining chamber within the housing and a compression chamber within the housing between the receiving means and the debris confining chamber. The blades advance the debris from the receiving means to the compression chamber and from the compression chamber to the debris confining chamber to compress debris received by the receiving means by the blades advancing from the receiving means to the compression chamber, from the compression chamber to the debris confining chamber, and from the debris confining chamber to the receiving means. The disposed means cooperate with the blades to substantially strip any debris from the blades prior to the blades advancing from the debris confining chamber to the receiving means. The debris confining chamber has an outlet adapted to receive a debris containing device. The blades are rotated by suitable means.

This invention also relates to an apparatus for collecting debris including a frame having wheels to support the frame. A housing, which is supported by the frame, has means to receive the debris and an outlet adapted to receive a hopper as a debris containing device. The housing has means between the receiving means and the outlet to compress debris including rotary means to continuously advance the debris through the housing to the housing outlet to cause compression of the debris due to movement of the debris through the housing by the rotary means. The hopper has an opening in its lower end communicating with the outlet when in a position to receive debris from the outlet. The hopper is pivotally mounted by suitable means for movement relative to the housing to enable the hopper to be moved from its debris receiving position to an unloading position in which the debris may fall from the housing by gravity through an opening in the upper end of the hopper.

The attached drawings illustrates a preferred embodiment of the invention, in which:

FIG. 1 is a side elevational view, partly in section, of a portion of the apparatus of the present invention;

FIG. 2 is a fragmentary top plan view of a portion of the apparatus of FIG. 1',

FIG. 3 is a top plan view, partly in section, showing the support structure for one end of the pick-up means with the chain omitted and taken along line 33 of FIG. 4',

FIG. 4 is a fragmentary side elevational view of a por tion of the apparatus of FIG. I and showing a portion of the chain drive arrangement between the pick-up means and the compactor blades of the compression means of the apparatus of FIG. I; and

FIG. 5 is a side elevational view of a portion of the apparatus of FIG. 1 showing another form of debris containing device.

Referring to the drawings and particularly FIG. I, there is shown a portion of a debris collecting apparatus 10. The apparatus I0 includes a frame or chassis II, which is substantially rectangular shaped. Wheels 12 (one shown) are rotatably supported on opposite sides of the frame 11 whereby the frame 11 may be pulled by a tractor, for example, as more particularly shown and described in the aforesaid Doering et al patent application and my aforesaid patent application.

The frame 11 has a housing 14 supported thereby. The housing 14 includes a curved bottom wall 15 and a top wall I6. A debris discharge outlet 17 is formed adjacent the junction of the walls I5 and 16. The outlet 17 is adapted to receive a debris containing device such as a bag 18, which collects the debris, in the manner more particularly shown and described in the aforesaid Doering et al patent application and my aforesaid pa tent application.

The housing 14 includes a pair of end plates 19, which are joined to opposite ends of the walls 15 and 16 and to opposite sides of the frame 11. A rod 20 extends between the cnd plates 19 to support one end of a plurality of U shaped stripper bars 21 within the housing 14. The other end of each of the U-shaped stripper bars 21 is disposed within a slot or opening 22 ofa downwardly depending flange 23 of the top wall 16 of the housing 14.

The flange 23 has the same number of the slots or openings 22 therein as there are the stripper bars 21.

Thus, each of the stripper bars 21 is disposed within a separate one of the slots or openings 22.

The slots or openings 22 along with spacers 24 on the rod 20, which is releasebly connected to each of the pair of the end plates 19, enable the stripper bars 21 to be separated from each other a predetermined distance. As shown in H6. 2, the spacers 24 are disposed between each adjacent pair of the stripper bars 21.

The stripper bars 21 are so disposed within the housing 14 that they cooperate with the bottom wall 15 of the housing 14 to provide a receiving means or chamber 25 within which the debris is received, a compression chamber 26, which is the smallest cross sectional area formed between the stripper bars 21 and the bottom wall 15 of the housing 14, and a debris confining chamber 27. The debris confining chamber 27 connects the compression chamber 26 with the discharge outlet 17 and has an increasing cross sectional area from the compression chamber 26 to the discharge out let 17 because of the stripper bars 21 and the bottom wall 15 of the housing 14 diverging away from each other.

The debris is advanced from the receiving means or chamber 25 through the compression chamber 26 to the debris confining chamber 27 by a plurality of rotatably mounted compactor blades 28. As shown in FIG.

2, each of the blades 28 is disposed between an adjar cent pair of the stripper bars 21 with a minimum clearance therebetween.

The substantially horizontal, rotary axis of the compactor blades 28 and the stripper bars 21 are located relative to each other so that each blade 29 of each of the compactor blades 28 ceases to extend into the debris confining chamber 27 approximately 90 after leaving the compression chamber 26 and enters between the confines of the legs of the U-shaped stripper bars 21. The location of the U-shaped stripper bars 2] on each side of each of the compactor blades 28 aids in stripping the debris from the blades 29 of the compactor blade 28. Each of the blades 29 passes outside of the confines of the legs of the U-shaped stripper bars 21 prior to entering the receiving means or chamber 25.

Each of the blades 29 has a curved surface 30 at its end. The curved surface 30 enables the debris to be more easily stripped from the blade 29 by the stripper bars 21.

The curved surface 30 is shaped to push material away as it passes between the stripper bars 21 on each side thereof. This is accomplished by the angle relation of the blade 29 to the stripper bar 2] always being greater than 90 so as not to pull the debris through the stripper bars 21.

Each of the wheels 12 includes a hub 21, which is rotatably supported on a round end 32 of a drive shaft 33, which is square shaped between its round ends. The ends 32 of the drive shaft 33 extend from opposite sides of the frame 11 in which the drive shaft 33 is rotatably supported by bearings 34 (one shown).

The compactor blades 28 are secured to the square shaped portion of the drive shaft 33. Each of the compactor blades 28 includes two separate members 35 with each of the member 35 having two of the blades 29 diametrically disposed to each other. Each of the members 35 has a square shaped opening for disposition on the square shaped portion of the drive shaft 33. Tubular spacers 36 are disposed between each of the compactor blades 28 to maintain the desired spacing therebetween. Each of the members 35 of each of the compactor blades 28 is designed with an off-set at its center to keep the tips of all of the blades 29 of each of the compactor blades 28 in the same plane whereby the opening between the adjacent stripper bars 21 is maintained at aminimum.

One of the round ends 32 of the drive shaft 33 is connected to one of the wheels 12 by a suitable one-way clutch 36', which is preferably the pawl drive arrangement shown and described in my aforesaid patent application. Accordingly, there is drive from the wheels 12 to the compactor blades 28 so that the compactor blades 28 are rotated only when the frame 11 is advanced.

The debris, which is supplied to the receiving means or chamber 25, may be directed thereto in any suitable manner. For example, the debris could be supplied from one or more lawn mowers in the manner shown and described in my aforesaid patent application.

However, the debris is preferably supplied to the receiving means or chamber 25 from a debris pick-up means. While the debris pick-up means may be the brush type, for example, shown in the aforesaid Doering et al patent application, it preferably is a wire pickup reel 37, which is supported by the frame 11.

The wire pick-up reel 37 is preferably similar to the type shown and described in my copending application for Fingers For Thatching Apparatus, Ser. No. 306,353, filed Nov. 13, l972, now abandoned. As shown and described in my aforesaid patent application, Ser. No. 306,35 3, the pick-up reel 37 includes a plurality of wires 38, which are supported in molded rubber sections fixed to a hollow shaft 39 by bolts, for

example.

Each segment of the rubber molded section has a plurality of the wires 38 arranged thereon in spaced relation in the direction of the longitudinal axis of the shaft 39 as shown in FIG. 2. Accordingly, a plurality of sets of the wires 38 is disposed along the length of the shaft 39 with each set of the wires 38 preferably having four of the wires 38. As shown in FIG. 1, the wires 38 of each set are displaced an equal angular amount from each other so that each of the four wires 38 of each set are from each of the adjacent wires 38. It should be understood that the wires 38 of each set are not necessarily aligned with the wires 38 of the other sets when viewed in the axial direction of the shaft 39. For example, the wires 38 could be arranged in a helix pattern.

The spacing of the sets of the wires 38 enables stripper bars 40 to be disposed between each set of the wires 38 with a minimum clearance between the wires 38 and the adjacent stripper bars 40. The stripper bars 40 are supported on a frame 41, which is fixed to the bottom wall 15 of the housing 14 by any suitable means such as welding, for example.

The rotary path of the ends of the wires 38 is disposed with respect to the configuration and location of the stripper bars 40 so that the debris is stripped from the wires 38 by the stripper bars 40 just prior to the debris entering the receiving means or chamber 25. Thus, as the wires 38 rotate clockwise, the debris is picked-up from the ground by the wires 38 and advanced to the receiving means or chamber 25.

The wire pick-up reel 37 is rotatably supported by the frame 11. The frame 11 has a plate 43 (see FIG. 3) secured to opposite sides of the frame 11. Each of the plates 43 has a collar 45 fixed thereto to receive a connecting pin 46. The connecting pin 46 extends through the collar 45 and into a bushing 47, which is fixed to the interior of the hollow shaft 39. Accordingly, the shaft 39 rotates about the connecting pins 46 at each end thereof.

Each of the connecting pins 46 is removably retained within the cooperating collar 45 by a cotter pin, for example, extending through an opening 48 in the pin 46 and aligned openings in the collar 45. Thus, the pins 46 function as a rotatable support for the shaft 39 of the pick-up reel 37.

The shaft 39 of the reel 37 is rotated from the wheels 12 through a chain drive. Accordingly, whenever the frame ll is advanced, the wires 38 of the pickup reel 37 are rotated to pick-up debris.

The chain drive includes a driven sprocket 49, which is fixed to one end of the shaft 39, and a driving sprocket 50 (see FlG. 2), which is supported on the square shaped portion of the drive shaft 33 of the compactor blades 28. Since the shaft 33 is driven only when the wheels 12 are rotated to advance the frame 1!, the sprocket 50 is turned only at this time. Thus, when the wheels [2 are not advanced. there is no rotation of the pickup reel 37.

The chain drive also includes an idler sprocket 51 (see FIG. 3), which is rotatably supported by one of the plates 43 of the frame 11, and a chain 52 (see FIG. 4). The chain 52 passes around the sprockets 50 and 51 but only over the top of the sprocket 49. As a result, the sprocket 49 is rotated in the opposite direction to the sprocket 50 whereby the wires 38 rotate clockwise while the wheels 12 rotate counterclockwise to advance the frame ll.

A cover 55 (see FIG. 1) cooperates with the wires 38 of the wire pick-up reel 37 to direct the debris to the receiving means or chamber 25. The cover 55 has its end plates 56 pivotaily connected to opposite sides of the frame ll by spring loaded L-shaped pivot pins 57 being disposed in openings in the frame ll. Accordingly, the cover 55 can pivot counterclockwise about the pins 57 to accommodate heavy loads of debris to prevent blocking by the debris of the area formed between the cover 55 and the stripper bars 40. The frame [1 has a plurality of openings in each of its sides to enable the pivot pins 57 to be disposed at different locations to change the pivot position of the cover 55.

The frame 1] can be pushed by an operator, selfpropelled, or pulled by a tractor or the like. When pulled by a tractor or the like, the frame 11 preferably has a braced tongue attached to the front of the frame ll in the manner more particularly shown and described in the aforesaid Doering et al patent application and my aforesaid patent application, Ser. No. 268,064, with an adjustable height means employed in conjunction therewith as more particularly shown and described in the aforesaid Doering et al patent application and my aforesaid patent application, Ser. No. 268,064.

Considering the operation of the apparatus of the present invention, the debris is picked-up by the wires 38 of the reel 37 as the frame 11 is advanced. The clockwise rotation of the wires 38 directs the debris to the receiving means or chamber 25 with the debris being stripped from the wires 38 by the stripper bars 40 just prior to the debris entering the receiving means or chamber 25. The compactor blades 28 are rotating counterclockwise and advance the debris from the receiving means or chamber 25 to the compression chamber 26 and from the compression chamber 26 to the debris confining chamber 27.

As the debris is advanced from the compression chamber 26 to the debris confining cham ber 27, the debris confining chamber 27 fills up. As the debris continues to be advanced from the compression chamber 26 to the debris confining chamber 27 by the compactor blades 28, the debris is eventually forced through the discharge outlet 17 into the bag 18. This pushing of the debris into the debris confining chamber 27 prior to its discharge through the outlet 17 compacts the debris so that the bag 18 holds much more debris than would normally be expected.

While the present invention has shown and described the pick-up reel 37 as being driven through a chain drive, it should be understood that any other suitable means could be employed for driving the reel 37. For example, a friction drive from one of the wheels 12 to a friction roller on the pick-up reel 37 could be employed. To prevent rotation of the pick-up reel 37 in the opposite direction when the frame 11 is backed up, it would be necessary to include a one-way clutch to connect the friction roller to the shaft 39 of the pick-up reel 37, for example. Any other suitable means for driving the pick-up reel 37 only when the frame 11 is advanced could be employed if desired.

While the pick-up reel 37 has been described as being the type shown and described in my aforesaid patent application, Ser. No. 306,353, so that thatching occurs when using the pickup reel 37, it should be understood that such is not necessary. Thus, the pick-up reel 37 could be replaced by any other suitable debris pick-up means, which may not thatch.

While the debris containing device has been shown and described as being the bag 18, it should be understood that any other type of suitable debris containing device could. be employed. For example, the bag 18 could be replaced by a hopper 60 (see FIG. 5). The hopper 60 could have a pyramid shape with its top 61 having an opening and its bottom 62 having an openmg.

When the hopper 60 is in the position to receive the debris from the outlet 17, the opening in the bottom 62 of the hopper 60 communicates with the outlet 17 through a coupling 63, which is secured to the housing 14, so that the debris may be forced into the hopper 60. instead of utilizing arms 64 (see FIG. 1), which are pivotally mounted on the frame 11 to support the bag supporting frame in the manner more particularly shown and described in the aforesaid Doering et al application, the arms 64 would be replaced by a pair of support straps 65 on opposite sides of the frame ll.

At the upper ends of the straps 65, the hopper 60 is pivotally mounted by means of a tubular member 66, which extends around three sides of the hopper 60. The tubular member 66 has the portion on its back side pivotally supported in a clevis 67 which is fixed to the top of each of the straps 65 so that the hopper 60 can pivot from the solid line position of FIG. 5 in which it receives the debris to the phantom line position of FIG. 5 in which the debris can fall from the hopper by gravity through the opening in the top 61 of the hopper 60. The tubular member 66 is retained within each of the clevises 67 by a pin 68.

Accordingly, the pivot point of the hopper 60 is disposed above the outlet 17. This enables pivoting of the hopper 60 to the position in which the debris may fall by gravity from the hopper 60 through the opening at the top 61.

If desired, a cover 69 is releasably secured to the top 61 of the hopper 60. The cover 69, which is preferably formed of a porous or screen type material, enables the capacity of debris contained within the hopper 60 to be increased almost double. This results in the need for less frequent stopping of the debris collecting apparatus to remove the debris from the hopper 60.

An advantage of this invention is that more debris can be placed in the bag. Another advantage of this invention is that it is relatively light weight.

For purposes ot'exemplification, a particular embodiment of the invention has been shown and described according to the best present understanding thereof. However, it will be apparent that changes and modifications in the arrangement and construction of the parts thereof may be resorted to without departing from the spirit and scope of the invention.

I claim:

1. An apparatus for collecting debris including:

a frame having wheels to support said frame;

a housing supported by said frame;

said housing having means to receive debris;

a plurality of blades disposed within said housing and mounted for rotation about an axis, said blades being spaced from each other in the axial direction:

means disposed within said housing between each adjacent pair of said blades and cooperating with said housing to form a debris confining chamber within said housing and a compression chamber within said housing between said receiving means and said debris confining chamber;

said blades advancing the debris from said receiving means to said compression chamber and from said compression chamber to said debris confining chamber to compress debris received by said receiving means by said blades advancing from said receiving means to said compression chamber, from said compression chamber to said debris confining chamber, and from said debris confining chamber to said receiving means;

said disposed means cooperating with said blades to substantially strip any debris from said blades prior to said blades advancing from said debris confining chamber to said receiving means;

said debris confining chamber having an outlet adapted to receive a debris containing device;

and means to rotate said blades.

2. The apparatus according to claim 1 in which:

said disposed means comprises:

a plurality of separate elements spaced from each other in a direction parallel to the axis of rotation of said blades to receive each of said blades between a pair of said elements;

and means to support said elements.

3. The apparatus according to claim 2 in which each of said elements comprises a substantially U-shaped stripper bar forming a portion of a wall of said compression chamber and a portion of a wall of said debris confining chamber.

4. The apparatus according to claim 3 in which said debris confining chamber has an increasing cross sectional area from said compression chamber to said outlet of said debris confining chamber.

5. The apparatus according to claim 3 in which a hopper is the debris containing device, said hopper has an opening in its lower end communicating with said outlet when in a position to receive debris from said outlet, said hopper has an opening at its upper end, and means to pivotally mount said hopper for movement relative to said housing to enable said hopper to be moved from its debris receiving position to an unloading position in which the debris may fall from said housing by gravity through said upper end opening.

6. The apparatus according to claim 5 in which said pivotal mounting means has its pivot above said outlet.

7. The apparatus according to claim 6 in which: said pivotal mounting means includes:

a pair of straps disposed on opposite sides of said housing; and means connected to said hopper and pivotally supported by said straps to pivotally connect said hopper to said straps. 8. The apparatus according to claim 1 in which a hopper is the debris containing device, said hopper has an opening in its lower end communicating with said outlet when in a position to receive debris from said outlet, said hopper has an opening at its upper end, and means to pivotally mount said hopper for movement relative to said housing to enable said hopper to be moved from its debris receiving position to an unloading position in which the debris may fall from said hous ing by gravity through said upper end opening.

9. The apparatus according to claim 8 in which said pivotal mounting means has its pivot above said outlet. 10. The apparatus according to claim 9 in which: said pivotal mounting means includes:

a pair of straps disposed on opposite sides of said frame; and means connected to said hopper and pivotally supported by said straps to pivotally connect said hopper to said straps. 11. An apparatus for collecting debris including: a frame having wheels to support said frame; a housing supported by said frame; said housing having means to receive debris; said housing having an outlet; said housing having means between said receiving means and said outlet to compress debris including rotary means to continuously advance the debris through said housing to said housing outlet to cause compression of the debris due to movement of the debris through said housing by said rotary means;

said outlet adapted to receive a hopper as a debris containing device;

said hopper having an opening in its lower end communicating with said outlet when in a position to receive debris from said outlet;

said hopper having an opening at its upper end;

and means to pivotally mount said hopper for movement relative to said housing to enable said hopper to be moved from its debris receiving position to an unloading position in which the debris may fall from said housing by gravity through said upper end opening.

12. The apparatus according to claim 11 in which said pivotal mounting means has its pivot above said outlet.

13. The apparatus according to claim 12 in which:

said pivotal mounting means includes:

a pair of straps disposed on opposite sides of said housing;

and means connected to said hopper and pivotally supported by said straps to pivotally connect said hopper to said straps. 

1. An apparatus for collecting debris including: a frame having wheels to support said frame; a housing supported by said frame; said housing having means to receive debris; a plurality of blades disposed within said housing and mounted for rotation about an axis, said blades being spaced from each other in the axial direction; means disposed within said housing between each adjacent pair of said blades and cooperating with said housing to form a debris confining chamber within said housing and a compression chamber within said housing between said receiving means and said debris confining chamber; said blades advancing the debris from said receiving means to said compression chamber and from said compression chamber to said debris confining chamber to compress debris received by said receiving means by said blades advancing from said receiving means to said compression chamber, from said compression chamber to said debris confining chamber, and from said debris confining chamber to said receiving means; said disposed means cooperating with said blades to substantially strip any debris from said blades prior to said blades advancing from said debris Confining chamber to said receiving means; said debris confining chamber having an outlet adapted to receive a debris containing device; and means to rotate said blades.
 2. The apparatus according to claim 1 in which: said disposed means comprises: a plurality of separate elements spaced from each other in a direction parallel to the axis of rotation of said blades to receive each of said blades between a pair of said elements; and means to support said elements.
 3. The apparatus according to claim 2 in which each of said elements comprises a substantially U-shaped stripper bar forming a portion of a wall of said compression chamber and a portion of a wall of said debris confining chamber.
 4. The apparatus according to claim 3 in which said debris confining chamber has an increasing cross sectional area from said compression chamber to said outlet of said debris confining chamber.
 5. The apparatus according to claim 3 in which a hopper is the debris containing device, said hopper has an opening in its lower end communicating with said outlet when in a position to receive debris from said outlet, said hopper has an opening at its upper end, and means to pivotally mount said hopper for movement relative to said housing to enable said hopper to be moved from its debris receiving position to an unloading position in which the debris may fall from said housing by gravity through said upper end opening.
 6. The apparatus according to claim 5 in which said pivotal mounting means has its pivot above said outlet.
 7. The apparatus according to claim 6 in which: said pivotal mounting means includes: a pair of straps disposed on opposite sides of said housing; and means connected to said hopper and pivotally supported by said straps to pivotally connect said hopper to said straps.
 8. The apparatus according to claim 1 in which a hopper is the debris containing device, said hopper has an opening in its lower end communicating with said outlet when in a position to receive debris from said outlet, said hopper has an opening at its upper end, and means to pivotally mount said hopper for movement relative to said housing to enable said hopper to be moved from its debris receiving position to an unloading position in which the debris may fall from said housing by gravity through said upper end opening.
 9. The apparatus according to claim 8 in which said pivotal mounting means has its pivot above said outlet.
 10. The apparatus according to claim 9 in which: said pivotal mounting means includes: a pair of straps disposed on opposite sides of said frame; and means connected to said hopper and pivotally supported by said straps to pivotally connect said hopper to said straps.
 11. An apparatus for collecting debris including: a frame having wheels to support said frame; a housing supported by said frame; said housing having means to receive debris; said housing having an outlet; said housing having means between said receiving means and said outlet to compress debris including rotary means to continuously advance the debris through said housing to said housing outlet to cause compression of the debris due to movement of the debris through said housing by said rotary means; said outlet adapted to receive a hopper as a debris containing device; said hopper having an opening in its lower end communicating with said outlet when in a position to receive debris from said outlet; said hopper having an opening at its upper end; and means to pivotally mount said hopper for movement relative to said housing to enable said hopper to be moved from its debris receiving position to an unloading position in which the debris may fall from said housing by gravity through said upper end opening.
 12. The apparatus according to claim 11 in which said pivotal mounting means has its pivot above said outlet.
 13. The apparatus according to claim 12 in which: said pivotal moUnting means includes: a pair of straps disposed on opposite sides of said housing; and means connected to said hopper and pivotally supported by said straps to pivotally connect said hopper to said straps. 